«Утвержден» Научно-методический совет Джизпи за№ от 2021 г. Председатель совета

6. Write the past simple of the following verbs.

1. 
   open opened
   
2. 
   love _________
   
3. 
   plan _______
   
4. 
   empty _______
   
5. 
   regret _______
   
6. 
   quarrel ______
   
7. 
   drop ________
   
8. 
   die _________
   
9. 
   cry _________
   
10. 
    fry ________
    
11. 
    arrive ______
    
12. 
    play ________
    
13. 
    stay ________
    
14. 
    travel _______
    
15. 
    close _______
    
16. 
    tidy ________
    

7. 
   Put the verbs in brackets into the present simple or the past simple
   

1. 
   We went (go) to the beach
   

last weekend.

2. 
   _________________________ (your mum / make) a chocolate cake yesterday?
   
3. 
   Dad _________________________ (not / work) on Sundays.
   
4. 
   He____________________ (not / come) to the party last Saturday.
   

5. My cousins ____________________ (not / visit) us every weekend.

6. _________________________ (Julia / wear ) jeans to school yesterday?

7. The children always ________________________ (do) their homework in their rooms.

8. I _____________________ (send) Claire an email yesterday afternoon.

5.4 Text: Technical assistance

Grammar: Present Perfect

Tasks

1. Read the text again and match each sentence with its ending.
A ny machine and device must be controlled regularly in order to avoid the risk of damage or breakdown of single parts due to long usage. Sometimes, if a proper maintenance is not done, a fault could / occur, with negative consequences on W the production process and on the workers’ safety. The primary goal of maintenance is to avoid or mitigate the consequences of failure of equipment. This includes performing routine actions to keep the device in working order and prevent the failure before it actually occurs (preventive aintenance), or fixing equipment after breakdown (corrective maintenance).Preventive maintenance is designed to preserve and restore equipment reliability by replacing worn omponents before they actually fail. It includes maintenance activities such as partial or complete overhauls at specified periods, oil changes and lubrication. The ideal preventive maintenance is a combination of technical, administrative and managerial actions to prevent all equipment failure. If carried out properly, preventive maintenance can extend the life of the equipment. Corrective maintenance, sometimes simply called ‘repair’, is carried out to get equipment working again. It aims at restoring the functionality of a machine so that it can continue to perform its work. This type of maintenance can be very expensive because sometimes equipment needs to be replaced, with substantial costs for the company. Generally, maintenance is scheduled according to:

• 
  the original equipment manufacturer’s recommendations;
  
• 
  codes and legislation within a country;
  
• 
  consultancy advice;
  
• 
  previous maintenance;
  
• 
  most important measured values and performance indications.
  

1. 
   
   
2. 
   Why is maintenance important?
   
3. 
   What are the main types of maintenance?
   
4. 
   What is the function of preventive maintenance?
   
5. 
   Which activities does it include?
   
6. 
   What is maintenance called if it occurs after a failure?
   
7. 
   Why can corrective maintenance be expensive?
   
8. 
   Which activities does it include?
   
9. 
   What is maintenance called if it occurs after a failure?
   
10. 
    Why can corrective maintenance be expensive?